This appears to rotate the points counterclockwise with positive theta. Is this conventional?
seanxu
The wikipedia example also uses counterclockwise rotation.
https://en.wikipedia.org/wiki/Rotation_matrix
jballouz
So given a matrix, one way to check if it is pure rotation is by performing the dot product of the columns and they should be orthogonal (i.e. dot product is 0)
lzhu21
Are all rotations conducted about the origin or is there a way to change center about which the rotation occurs?
This appears to rotate the points counterclockwise with positive theta. Is this conventional?
The wikipedia example also uses counterclockwise rotation. https://en.wikipedia.org/wiki/Rotation_matrix
So given a matrix, one way to check if it is pure rotation is by performing the dot product of the columns and they should be orthogonal (i.e. dot product is 0)
Are all rotations conducted about the origin or is there a way to change center about which the rotation occurs?